API 510 Question Bank (API 510 QB001)

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1. In a 30 mm thick cylindrical shell, the longitudinal as well as circumferential joints are double welded butt welds with full penetration. Which of the following is true as regards the longitudinal and circumferential joints?

a. They are of same category but different types.

b. They are of same type but different categories.

c. Both the category as well as type are same.

d. Both the category as well as type are different.

2. Vessel MAWP of existing vertical vessel will be affected for which of the following?

a. If Vessel Part MAWP changes for any vessel part.

b. If design pressure is reduced  (other factors remaining same)

c. Vessel height is changed by adding/deleting a shell course

d. A and C

3.   A Shell with Inside dia = 2200 mm, and Corr. allow.= 5 mm is to be designed as per ASME Sec. VIII , Div.1. What will the value of “R” in design formula for shell thickness?

a. 1100 mm         

b. 1105 mm          

c. 1095 mm          

d. 1110 mm

4. In thickness formula for internal pressure for shell, term ‘E’ refers to:

a. Modules of Elasticity of material 

b. Thermal Expansion

c. Joint efficiency of the weld

d. None of above

5. The hydrostatic pressure caused by 10 ft. of liquid column (sp. gr. = 1) will be:

a. 10 psi        

b. 43.3 psi          

c. 4.33 psi          

d. None of the above

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